Keystones — Lintel
Five GCSE retrieval questions · 12 November 2024 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.028
Answer: 2.8 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 25°. Find adjacent side
Answer: 22.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 25, 44, 42, what is the missing number?
Answer: -11